lib/libsys/execve.2

47 transforms the calling process into a new process.
48 The new process is constructed from an ordinary file,
52 .Em new process file .
107 process.
120 new process that is not directly an argument to the command (see
123 File descriptors open in the calling process image remain open in
124 the new process image, except for those for which the close-on-exec
137 is called, and the process will gain privilege as a result of set-id
143 Signals set to be ignored in the calling process are set to be ignored in
145 new process.
146 Signals which are set to be caught in the calling process image
147 are set to default action in the new process image.
153 If the set-user-ID mode bit of the new process image file is set
156 the effective user ID of the new process image is set to the owner ID
157 of the new process image file.
158 If the set-group-ID mode bit of the new process image file is set,
159 the effective group ID of the new process image is set to the group ID
160 of the new process image file.
163 other group IDs of the new process image remain the same as the calling
164 process image.
173 option enabled or if the new process file is an interpreter file.
177 The new process also inherits the following attributes from
178 the calling process:
181 .It process ID Ta see Xr getpid 2
182 .It parent process ID Ta see Xr getppid 2
183 .It process group ID Ta see Xr getpgrp 2
226 However, if the file to be executed denies read permission for the process
239 system call overlays the current process image
240 with a new process image the successful call
241 has no process to return to.
244 does return to the calling process an error has occurred; the
252 will fail and return to the calling process if:
267 The new process file does not exist.
273 The new process file is not an ordinary file.
275 The new process file mode denies execute permission.
280 The new process file has the appropriate access
283 The new process file is a pure procedure (shared text)
284 file that is currently open for writing by some process.
286 The new process requires more virtual memory than
290 The number of bytes in the new process' argument list
297 The new process file is not as long as indicated by
316 will fail and return to the calling process if: